3 recent "Did you know?":
... that Chiara Daraio used Newton's cradle to create sound bullets, and ball bearing filled walls to create one-way sound barriers? https://en.wikipedia.org/wiki/Chiara_Daraio
... that a tetrahedron with integer edge lengths, face areas, and volume can be given integer coordinates?
... that former college basketball star Amy Langville is an expert in ranking systems, and has applied her ranking expertise to basketball bracketology?
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